Radiosignaling system



J. H. ROGERS.

RADIOSIGNALING SYSTEM. APPLICATlON HLEI') MAR.-9, 1920. RENEWED SEPT. 12. 1921.

1,395,454. Patented Nov. 1, 1921.

I N V EN TOR.

A TTORNEYS.

UNITED STATES.

PATENT OFFICE.

JAMES HARRIS ROGERS, OF HYAT'I'SVILLE, MARYLAND.

RADIOSIGNALING SYSTEM.

Specification of Letters Patent.

Patented Nov. 1, 1921.

Application filed March 9, 1920, Serial No. 364,400. Renewed September 12, 1921. Serial No. 500,271.

To whom it may concern:

Be it known that I, JAMES HARRIS Roo- ERs, citizen of the United States, residing at Hyattsville, in the county of Prince Georges and State of Maryland, have invented certain new and useful Improvements in Radio- Signaling Systems, of which the following is a specification. V

My invention relates to raidio signaling and has for its object the provision of an improved system for use in connection with vessels, especially submarine vessels.

The invention includes the employment of an antenna or radio conductor upon which the signal electromagnetic waves are received, or from which such waves are radiated in sending, located within the metallic hull of the vessel, and in utilizing the vessel itself as part of the system. This and more specific objects will be fully explained hereinafter.

The invention consists in the novel construction and arrangement of parts of a radio system hereinafter described and claimed, and illustrated in the accompanying drawings, in which drawings Figure 1 is a longitudinal section of a vessel with apparatus and circuits shown in diagram;

Fig. 1- shows a conventional arrangement of sending instruments which may be substituted for the receiving instruments for transmitting signals;

Figs. 2, 3, 4 and 5 show in diagram various modifications of the invention, the vessel being indicated in outline.

Referring to the drawings and first particularly to Figs. 1 and 2 thereof, 10 indicates a vessel of the'submarine type having a metallic hull .or sheathing which includes a deck or upper surface as. well as the sides and bottom. Within the vessel is located an antenna or radio conductor 11-11 extending longitudinally of the vessel and having its ends electrically connected to the hull at connected to the hull at other points if desired. If the antenna is not the proper length for the wave-length tobe used, a tuning condenser may be employed as is well understood, and although it is thought this former. In Fig. 1 receiving radio or magnetic wave signaling instruments are conventionally shown 1n diagram, consisting of a detector 17 of any type, preferably an audion, telephone 18, and the usual condensers 19 and 20.

In Fig. 1 suitable sending instruments are conventionally shown in diagram. These comprise a generator 21 or other source of alternating or other suitable current, transformer 22, spark gap 23, condenser 24' and key 25. These instruments are, of course, in the vessel and may be substituted for the receiving set when it is desired to transmit signals. l

In the operation of the system as thus far described and supposing it is desired to receive signals from another submarine or other vessel, or from a land station, the receiving vessel is manipulated if necessary to obtain the best directional effect on its antenna which, being tuned to the proper wave-length, yields signals with clearness and high audibility. It will thus be seen that my antenna extends longitudinally within the vessel and is completely inclosed by the metal (such as iron or steel) thereof. Moreover, the antenna forms a part of a loop conductor of which the hull of the vessel forms the other part.

In sending, the sending set is forthe receiving set and key 25 is manipulated as usual.

Instead of having the antenna extend from end to end of the vessel, one portion thereof, as 11, may be replaced by a capacity plate 26 which is located in proximity to,

but separated by insulation 27 from the bot the capacity as a substitute for a part of the antenna.

In Fig. 2, I have shown acoiled or looped portion 29 included in the antenna, this operating to obtain a greater length antenna,

substituted and also improving the results 1n some instances.

tor connected in the circuit of antenna 11,

11', th tuning condenser bein in series in ductor extending longitudinall the loop. The loop itself is in shunt to the coil 16 of indirect coupling.

Fig. 4 shows a closed oscillating circuit looped antenna 31 entirely. inclosed within the vessel but not connected electrically with the metallic hull or sheathing. The tuning condenser is bridged across the circuit.

Fig. 5 show asimilar arrangement except that the condenser is in series in the oscillating looped circuit. In both the arrangements the signal instruments are as in the other figures, and represented broadly by coil 16. Very good results are obtained by these arrangements.

In accordance with the patent statutes, I have described what I believeto be the best embodiment of the invention, but I do not wish to be understood as thereby limiting myself or the sco e of the. invention, as many changes an modifications may be made without departin'g'from the spirit of the invention and all such Iaim to include within the scope of the appended claims. For instance, a plurality of antennae may be employed instead of one.

What I claim is:

1. The combination with a submarine vessel having a metallic hull or sheathing, of anantenna extending longitudinally within and inclosed by said hull or sheathing and electrically connected to the same, and signal instruments associated with said antenna.

2. The combination with a submarine vessel having a metallic hull or sheathing, of an antenna Within and inclosed by said hull or sheathing, a portion at least of said antenna extending longitudinally of the vessel and electrically connected to the hull or sheathing, and signal instruments associated with said antenna.

3. The combination with a submarine vessel having a metallic hull or sheathing, of an antenna extending longitudinally within and inclosed by said hull or sheathing with its ends at the eiids of the vessel and electricallyconnected to corresponding ends of the same, and signal instruments associated with said antenna.

4. A radio signalsystem having a closed oscillating loop circuit comprising the metallic hull or sheathing of a vessel and a conwithin and inclosed by and having its en s electrically connected with said metallic hill or sheathing, and signal instruments associated with said conductor.

5. A radio signal system having a closed oscillating loop circuit comprising the metallichull or sheathing of a submarine vessel with said conductor, and signal instruments associated with said conductor.

7. A radio signal system having a closed oscillating loop circuit comprising the metallic hull or sheathing of a vessel and a conductor extending longitudinally within and inclosed by and having its respective ends electrically connected with corresponding ends of said metallic hull or sheathing, a

tuning condenser in circuit with said con-' ductor, and signal instruments associated with said conductor. v

8. The combination with'a vessel having a metallic hull or sheathing, a closed oscillating loop within and inclosed by said hull or sheathing, a conductor extending from one side of said loop and making electrical connection with the hull or sheathing at approximately one end of the vessel, a conductor extending from the other side of said loop and making electrical connection with the hull or sheathing at approximately the other end of the vessel, and electromagnetic wave signal instruments associated with said loop.

9. The combination with a vessel having a metallic hull or sheathing, an oscillating loop within said hull or sheathing, a conductor connecting said loop with the forward end of said hull and a second conductor connecting said loop with the rearward end of said hull, and radio signal instruments operatively associated with the circuit thus formed.

10. The combination with a vessel having a metallic hull or sheathing, an oscillating loop within said hull or sheathing, a conductor connecting said loop with the for ward end of said hull and a second conductor connecting said loop with the rearward end of said hull, a tuning condenser in the circuit thus formed, and radio signal instruments operatively associated with said circuit. A

In testimony whereof I afiix my signature.

JAMES HARRIS ROGERS. 

